Forums Scripts & Popups on input

and if i make
alias mode { bla bla }

what should i write so that it dont reflect on other modes
if i make it to detect only +h and +u on undernet
then what to do write so it wont interfire with
/mode $chan +b or +o someone

OR

/mode $channel +s +i +l

etc...

because i already have this in aliases:

mode {
If ($1) && (+b == $2) { set %bch $1 }
mode $1-
}


???